/*
 * Copyright (c) 2011, Nikolaus Moll
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the gradecalculator.net nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package net.gradecalculator.plugin.core.factory.impl;

import java.util.LinkedList;
import java.util.List;

import net.gradecalculator.core.interfaces.IElectiveCoursesArea;
import net.gradecalculator.core.interfaces.IElectiveModulesArea;
import net.gradecalculator.core.interfaces.IModule;
import net.gradecalculator.core.interfaces.IModuleList;
import net.gradecalculator.core.interfaces.IModuleListItem;
import net.gradecalculator.core.interfaces.IRegulationsItem;

public class CoreModuleList extends AbstractCoreRegulationsItem implements IModuleList {

	private float ects = 0;
	private int hoursperweek = 0;
	private int gradedModules = 0;

	@Override
	public List<IModuleListItem> getModules() {
		final List<IModuleListItem> result = new LinkedList<IModuleListItem>();
		for (final IRegulationsItem item : getChildren()) {
			result.add((IModuleListItem) item);
		}
		return result;
	}

	@Override
	public void setModules(final List<IModuleListItem> courses) {
		final List<IRegulationsItem> children = new LinkedList<IRegulationsItem>();
		for (final IModuleListItem item : courses) {
			children.add(item);
		}
		setChildren(children);
	}

	@Override
	public void addModule(final IModuleListItem module) {
		addChild(module);
	}

	@Override
	public void removeModule(final IModuleListItem module) {
		removeChild(module);
	}

	@Override
	public void addChild(final IRegulationsItem item) {
		super.addChild(item);

		final IModuleListItem module = (IModuleListItem) item;
		ects += module.getECTS();
		hoursperweek += module.getHoursPerWeek();
		if (!module.isGraded()) {
			gradedModules++;
		}
	}

	@Override
	public void removeChild(final IRegulationsItem item) {
		super.removeChild(item);

		final IModuleListItem module = (IModuleListItem) item;
		ects -= module.getECTS();
		hoursperweek -= module.getHoursPerWeek();
		if (!module.isGraded()) {
			gradedModules--;
		}
	}

	@Override
	public float getECTS() {
		return ects;
	}

	@Override
	public int getHoursPerWeek() {
		return hoursperweek;
	}

	@Override
	public void insertModule(final IModuleListItem module, final IModuleListItem moduleBefore) {
		insertChild(module, moduleBefore);
	}

	@Override
	public boolean isAddable(final IRegulationsItem item) {
		if (item instanceof IElectiveCoursesArea) {
			return true;
		}
		if (item instanceof IElectiveModulesArea) {
			return true;
		}
		if (item instanceof IModule) {
			return true;
		}

		return false;
	}

	@Override
	public boolean isGraded() {
		return gradedModules > 0;
	}

}
